If you fall asleep at 8pm and wake up at 4am with 8 hours of sleep why do you feel extremely tired by 10am, but if you go to sleep at 11pm and wake up at 7am you can stay up all day without feeling very sluggish? Does it have something to do with waking up while it’s still dark?
In: Biology
Yes it can, you can help jumpstart yourself by turning on your lights etc because light helps you wake up. I used to stare at the light in the shower which I understand sounds a bit funny but was actually advice from a sleep specialist.
The other thing that helps is to try and sleep in multiples of three hours, i.e. you will find it easier to wake up if you sleep for six hours than seven hours, broadly speaking.
Depends on your circadian rhythm (sleep cycle is a circadian rhythm.) A circadian rhythm is essentially your body cycling in tandem with the sun, so every 24 hours.
Some people for example are “night owls,” their natural sleep cycle tends to be early hours of the morning (2-6 am) until 10am-2pm.
A theory behind why people are night owls is that in the hunter gatherer societies some people would have to stay awake to alert the tribe to any predators or other threats. Which of course increases the likelihood of the tribe as a whole to pass on their genes. It’s been argued that it’s a remnant of those times.
Most people however have a natural sleep cycle, which is the classic 10-11pm until 6/7 pm. That’s mostly due to us evolving to not be nocturnal.
In essence, having people with different sleep cycles, helped protect the tribe. One study showed that Europeans are far more likely to carry the gene. This could possibly be due to how far North Europe is. For example, London is further North than the vast majority of Canadian cities, yet it’s one of the most southern British cities. That means that in December day light is a little over 6 hours long. Which means there is far more time where the tribe would remain vulnerable.
This is because there is usually no sunlight at 4am. At 7am, there is sunlight, so your internal clock can suppress melatonin production to go into lighter sleep and eventually wake up.
This most definitely isn’t something universal? I go to bed around 8-9 and get up at 4 every day, and I’m never tired at 10am.
It all depends if you wake up during one of your REM cycles or after REM cycle. On average you go through 3-5 REM cycles per night. And If you wake up in the middle of cycle you will feel like shit, doesn’t matter if you slept 4 or 8 hours…same if you wake up after cycle you will feel rested.
i go to sleep at 6am since i work nights, wake up around 11-13 most days and feel great, i can start to feel tired around 4-5am sometimes which is just before the light starts to rise.
But i also go to sleep with a movie playing and can see the light outside the curtains and have no issues
Its just you, maybe you aren’t eating at the right times, calories and blood sugar have a lot to do with being tired. I go to bed a 10 and wake up 4:45 every day. I start with a cup of coffee, and wait until 7:30 to eat any thing, then a small snack at 10am, lunch 1230, dinner by 7pm . I work 14 and 2s, meaning I work 14 days straight for 12 hours a day, then I get two consecutive days off. I’ll admit that by day 10 I. Usually tired by noon lol but make sure you’re eating right. No sugary breakfast foods, you’ll just crash mid morning, fats and protein for breakfast. Midmorning boost can have a little sugar, I like a Danish and a chocolate milk.
Your body produces hormones at different times of day that help ou feel more asleep or awake. This is a little bit different for everyone. These hormones are affected by lot of different things like
The amount of light you get
When you eat
What your normal sleep routine is
Genetics
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